Gd::opacity() - Code Metrics - Inspection of "added webp to gd" - oscarotero/imagecow - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 1dd68b...a95690 )

by Oscar

created 2019-01-03 13:19 UTC

Gd::opacity() B

↳ Parent: Gd

Complexity

Conditions	6
Paths	5

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	30
rs	8.8177
c	0
b	0
f	0
cc	6
nc	5
nop	1

<?php

namespace Imagecow\Libs;

use Imagecow\ImageException;

/**
 * GD library.
 */
class Gd extends AbstractLib implements LibInterface
{
    public static $fallbackCropMethods = [
        'Entropy' => ['center', 'middle'],
        'Balanced' => ['center', 'middle'],
    ];

    protected $image;
    protected $type;

    /**
     * {@inheritdoc}
     */
    public static function checkCompatibility()
    {
        return extension_loaded('gd');
    }

    /**
     * {@inheritdoc}
     */
    public static function createFromFile($filename)
    {
        $data = getImageSize($filename);

        if (empty($data) || !is_array($data)) {
            throw new ImageException("The image file '{$filename}' cannot be loaded");
        }

        $function = 'imagecreatefrom'.image_type_to_extension($data[2], false);

        if (function_exists($function)) {
            return new static($function($filename), $data[2]);
        }
    }

    /**
     * {@inheritdoc}
     */
    public static function createFromString($string)
    {
        if (($image = imagecreatefromstring($string))) {
            return new static($image);
        }

        throw new ImageException('Error creating the image from string');
    }

    /**
     * Constructor of the class.
     *
     * @param resource $image The Gd resource.
     */
    public function __construct($image, $type = null)
    {
        $this->image = $image;
        $this->type = isset($type) ? $type : IMAGETYPE_PNG;

        imagealphablending($this->image, true);
        imagesavealpha($this->image, true);
    }

    /**
     * Destroy the image.
     */
    public function __destruct()
    {
        imagedestroy($this->image);
    }

    /**
     * {@inheritdoc}
     */
    public function flip()
    {
        imageflip($this->image, IMG_FLIP_VERTICAL);
    }

    /**
     * {@inheritdoc}
     */
    public function flop()
    {
        imageflip($this->image, IMG_FLIP_HORIZONTAL);
    }

    /**
     * {@inheritdoc}
     */
    public function save($filename)
    {
        $extension = image_type_to_extension($this->type, false);
        $function = 'image'.$extension;

        if (!function_exists($function) || ($function($this->image, $filename) === false)) {
            throw new ImageException("The image format '{$extension}' cannot be saved to '{$filename}'");
        }
    }

    /**
     * Gets the original image object.
     *
     * @return resource
     */
    public function getImage()
    {
        return $this->image;
    }

    /**
     * {@inheritdoc}
     */
    public function getString()
    {
        $extension = image_type_to_extension($this->type, false);
        $function = 'image'.$extension;

        if (!function_exists($function)) {
            throw new ImageException("The image format '{$extension}' cannot be exported");
        }

        ob_start();

        if ($extension === 'jpeg') {
            $function($this->image, null, $this->quality);
        } else {
            $function($this->image);
        }

        return ob_get_clean();
    }

    /**
     * {@inheritdoc}
     */
    public function getMimeType()
    {
        return image_type_to_mime_type($this->type);
    }

    /**
     * {@inheritdoc}
     */
    public function getWidth()
    {
        return imagesx($this->image);
    }

    /**
     * {@inheritdoc}
     */
    public function getHeight()
    {
        return imagesy($this->image);
    }

    /**
     * {@inheritdoc}
     */
    public function format($format)
    {
        switch (strtolower($format)) {
            case 'jpg':
            case 'jpeg':
                $width = $this->getWidth();
                $height = $this->getHeight();

                if (($image = imagecreatetruecolor($width, $height)) === false) {
                    throw new ImageException('Error creating a image');
                }

                if (imagesavealpha($image, true) === false) {
                    throw new ImageException('Error saving the alpha chanel of the image');
                }

                if (isset($this->background[3])) {
                    $background = imagecolorallocatealpha($image, $this->background[0], $this->background[1], $this->background[2], $this->background[3]);
                } else {
                    $background = imagecolorallocate($image, $this->background[0], $this->background[1], $this->background[2]);
                }

                if (imagefill($image, 0, 0, $background) === false) {
                    throw new ImageException('Error filling the image');
                }

                imagecopy($image, $this->image, 0, 0, 0, 0, $width, $height);

                imagedestroy($this->image);
                $this->image = $image;
                $this->type = IMAGETYPE_JPEG;
                break;

            case 'gif':
                $this->type = IMAGETYPE_GIF;
                break;

            case 'png':
                $this->type = IMAGETYPE_PNG;
                break;

            case 'webp':
                $this->type = IMAGETYPE_WEBP;
                break;

            default:
                throw new ImageException("The image format '{$format}' is not valid");
        }
    }

    /**
     * imagescale() is not used due a weird black border:
     * https://bugs.php.net/bug.php?id=73281&thanks=6
     * 
     * {@inheritdoc}
     */
    public function resize($width, $height)
    {
        $image = $this->createImage($width, $height, array(0, 0, 0, 127));

        if (imagecopyresampled($image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight()) === false) {
            throw new ImageException('Error resizing the image');
        }

        imagedestroy($this->image);
        $this->image = $image;
    }

    /**
     * {@inheritdoc}
     */
    public function getCropOffsets($width, $height, $method)
    {
        if (empty(static::$fallbackCropMethods[$method])) {
            throw new ImageException("The crop method '$method' is not available for Gd");
        }

        return static::$fallbackCropMethods[$method];
    }

    /**
     * {@inheritdoc}
     */
    public function crop($width, $height, $x, $y)
    {
        $crop = [
            'width' => $width,
            'height' => $height,
            'x' => $x,
            'y' => $y,
        ];

        if (($image = imagecrop($this->image, $crop)) === false) {
            throw new ImageException('Error cropping the image');
        }

        imagedestroy($this->image);
        $this->image = $image;
    }

    /**
     * {@inheritdoc}
     */
    public function rotate($angle)
    {
        $background = imagecolorallocatealpha($this->image, 0, 0, 0, 127);

        if ($background === false || ($image = imagerotate($this->image, -$angle, $background)) === false) {
            throw new ImageException('Error rotating the image');
        }

        imagecolortransparent($image, imagecolorallocatealpha($image, 0, 0, 0, 127));

        imagedestroy($this->image);
        $this->image = $image;
    }

    /**
     * {@inheritdoc}
     */
    public function blur($loops)
    {
        $width = $this->getWidth();
        $height = $this->getHeight();
        $loops *= 10;

        $this->resize($width / 5, $height / 5);

        for ($x = 0; $x < $loops; $x++) {
            if (($x % 4) === 0) {
                imagefilter($this->image, IMG_FILTER_SMOOTH, -4);
                imagefilter($this->image, IMG_FILTER_BRIGHTNESS, 2);
            }

            imagefilter($this->image, IMG_FILTER_GAUSSIAN_BLUR);
        }

        $this->resize($width, $height);
    }

    /**
     * {@inheritdoc}
     */
    public function watermark(LibInterface $image, $x, $y)
    {
        if (!($image instanceof self)) {
            $image = self::createFromString($image->getString());
        }

        imagecopy($this->image, $image->getImage(), $x, $y, 0, 0, $image->getWidth(), $image->getHeight());
    }

    /**
     * {@inheritdoc}
     */
    public function opacity($opacity)
    {
        if ($opacity >= 100 || $opacity < 0) {
            return;
        }

        $this->format('png');

        $opacity = $opacity / 100;

        $width = $this->getWidth();
        $height = $this->getHeight();

        imagealphablending($this->image, false);

        for ($x = 0; $x < $width; ++$x) {
            for ($y = 0; $y < $height; ++$y) {
                $color = imagecolorat($this->image, $x, $y);
                $alpha = 127 - (($color >> 24) & 0xFF);

                if ($alpha <= 0) {
                    continue;
                }

                $color = ($color & 0xFFFFFF) | ((int) round(127 - $alpha * $opacity) << 24);

                imagesetpixel($this->image, $x, $y, $color);
            }
        }
    }

    /**
     * {@inheritdoc}
     */
    public function setProgressive($progressive)
    {
        imageinterlace($this->image, $progressive);
    }

    /**
     * Creates a new truecolor image
     *
     * @param integer $width
     * @param integer $height
     * @param array   $background
     *
     * @return resource
     */
     private function createImage($width, $height, array $background = [0, 0, 0])
    {
        if (($image = imagecreatetruecolor($width, $height)) === false) {
            throw new ImageException('Error creating a image');
        }

        if (imagesavealpha($image, true) === false) {
            throw new ImageException('Error saving the alpha chanel of the image');
        }

        if (isset($background[3])) {
            $background = imagecolorallocatealpha($image, $background[0], $background[1], $background[2], $background[3]);
        } else {
            $background = imagecolorallocate($image, $background[0], $background[1], $background[2]);
        }

        if (imagefill($image, 0, 0, $background) === false) {
            throw new ImageException('Error filling the image');
        }

        return $image;
    }
}


1			<?php
2
3			namespace Imagecow\Libs;
4
5			use Imagecow\ImageException;
6
7			/**
8			* GD library.
9			*/
10			class Gd extends AbstractLib implements LibInterface
11			{
12			public static $fallbackCropMethods = [
13			'Entropy' => ['center', 'middle'],
14			'Balanced' => ['center', 'middle'],
15			];
16
17			protected $image;
18			protected $type;
19
20			/**
21			* {@inheritdoc}
22			*/
23			public static function checkCompatibility()
24			{
25			return extension_loaded('gd');
26			}
27
28			/**
29			* {@inheritdoc}
30			*/
31			public static function createFromFile($filename)
32			{
33			$data = getImageSize($filename);
34
35			if (empty($data) \|\| !is_array($data)) {
36			throw new ImageException("The image file '{$filename}' cannot be loaded");
37			}
38
39			$function = 'imagecreatefrom'.image_type_to_extension($data[2], false);
40
41			if (function_exists($function)) {
42			return new static($function($filename), $data[2]);
43			}
44			}
45
46			/**
47			* {@inheritdoc}
48			*/
49			public static function createFromString($string)
50			{
51			if (($image = imagecreatefromstring($string))) {
52			return new static($image);
53			}
54
55			throw new ImageException('Error creating the image from string');
56			}
57
58			/**
59			* Constructor of the class.
60			*
61			* @param resource $image The Gd resource.
62			*/
63			public function __construct($image, $type = null)
64			{
65			$this->image = $image;
66			$this->type = isset($type) ? $type : IMAGETYPE_PNG;
67
68			imagealphablending($this->image, true);
69			imagesavealpha($this->image, true);
70			}
71
72			/**
73			* Destroy the image.
74			*/
75			public function __destruct()
76			{
77			imagedestroy($this->image);
78			}
79
80			/**
81			* {@inheritdoc}
82			*/
83			public function flip()
84			{
85			imageflip($this->image, IMG_FLIP_VERTICAL);
86			}
87
88			/**
89			* {@inheritdoc}
90			*/
91			public function flop()
92			{
93			imageflip($this->image, IMG_FLIP_HORIZONTAL);
94			}
95
96			/**
97			* {@inheritdoc}
98			*/
99			public function save($filename)
100			{
101			$extension = image_type_to_extension($this->type, false);
102			$function = 'image'.$extension;
103
104			if (!function_exists($function) \|\| ($function($this->image, $filename) === false)) {
105			throw new ImageException("The image format '{$extension}' cannot be saved to '{$filename}'");
106			}
107			}
108
109			/**
110			* Gets the original image object.
111			*
112			* @return resource
113			*/
114			public function getImage()
115			{
116			return $this->image;
117			}
118
119			/**
120			* {@inheritdoc}
121			*/
122			public function getString()
123			{
124			$extension = image_type_to_extension($this->type, false);
125			$function = 'image'.$extension;
126
127			if (!function_exists($function)) {
128			throw new ImageException("The image format '{$extension}' cannot be exported");
129			}
130
131			ob_start();
132
133			if ($extension === 'jpeg') {
134			$function($this->image, null, $this->quality);
135			} else {
136			$function($this->image);
137			}
138
139			return ob_get_clean();
140			}
141
142			/**
143			* {@inheritdoc}
144			*/
145			public function getMimeType()
146			{
147			return image_type_to_mime_type($this->type);
148			}
149
150			/**
151			* {@inheritdoc}
152			*/
153			public function getWidth()
154			{
155			return imagesx($this->image);
156			}
157
158			/**
159			* {@inheritdoc}
160			*/
161			public function getHeight()
162			{
163			return imagesy($this->image);
164			}
165
166			/**
167			* {@inheritdoc}
168			*/
169			public function format($format)
170			{
171			switch (strtolower($format)) {
172			case 'jpg':
173			case 'jpeg':
174			$width = $this->getWidth();
175			$height = $this->getHeight();
176
177			if (($image = imagecreatetruecolor($width, $height)) === false) {
178			throw new ImageException('Error creating a image');
179			}
180
181			if (imagesavealpha($image, true) === false) {
182			throw new ImageException('Error saving the alpha chanel of the image');
183			}
184
185			if (isset($this->background[3])) {
186			$background = imagecolorallocatealpha($image, $this->background[0], $this->background[1], $this->background[2], $this->background[3]);
187			} else {
188			$background = imagecolorallocate($image, $this->background[0], $this->background[1], $this->background[2]);
189			}
190
191			if (imagefill($image, 0, 0, $background) === false) {
192			throw new ImageException('Error filling the image');
193			}
194
195			imagecopy($image, $this->image, 0, 0, 0, 0, $width, $height);
196
197			imagedestroy($this->image);
198			$this->image = $image;
199			$this->type = IMAGETYPE_JPEG;
200			break;
201
202			case 'gif':
203			$this->type = IMAGETYPE_GIF;
204			break;
205
206			case 'png':
207			$this->type = IMAGETYPE_PNG;
208			break;
209
210			case 'webp':
211			$this->type = IMAGETYPE_WEBP;
212			break;
213
214			default:
215			throw new ImageException("The image format '{$format}' is not valid");
216			}
217			}
218
219			/**
220			* imagescale() is not used due a weird black border:
221			* https://bugs.php.net/bug.php?id=73281&thanks=6
222			*
223			* {@inheritdoc}
224			*/
225			public function resize($width, $height)
226			{
227			$image = $this->createImage($width, $height, array(0, 0, 0, 127));
228
229			if (imagecopyresampled($image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight()) === false) {
230			throw new ImageException('Error resizing the image');
231			}
232
233			imagedestroy($this->image);
234			$this->image = $image;
235			}
236
237			/**
238			* {@inheritdoc}
239			*/
240			public function getCropOffsets($width, $height, $method)
241			{
242			if (empty(static::$fallbackCropMethods[$method])) {
243			throw new ImageException("The crop method '$method' is not available for Gd");
244			}
245
246			return static::$fallbackCropMethods[$method];
247			}
248
249			/**
250			* {@inheritdoc}
251			*/
252			public function crop($width, $height, $x, $y)
253			{
254			$crop = [
255			'width' => $width,
256			'height' => $height,
257			'x' => $x,
258			'y' => $y,
259			];
260
261			if (($image = imagecrop($this->image, $crop)) === false) {
262			throw new ImageException('Error cropping the image');
263			}
264
265			imagedestroy($this->image);
266			$this->image = $image;
267			}
268
269			/**
270			* {@inheritdoc}
271			*/
272			public function rotate($angle)
273			{
274			$background = imagecolorallocatealpha($this->image, 0, 0, 0, 127);
275
276			if ($background === false \|\| ($image = imagerotate($this->image, -$angle, $background)) === false) {
277			throw new ImageException('Error rotating the image');
278			}
279
280			imagecolortransparent($image, imagecolorallocatealpha($image, 0, 0, 0, 127));
281
282			imagedestroy($this->image);
283			$this->image = $image;
284			}
285
286			/**
287			* {@inheritdoc}
288			*/
289			public function blur($loops)
290			{
291			$width = $this->getWidth();
292			$height = $this->getHeight();
293			$loops *= 10;
294
295			$this->resize($width / 5, $height / 5);
296
297			for ($x = 0; $x < $loops; $x++) {
298			if (($x % 4) === 0) {
299			imagefilter($this->image, IMG_FILTER_SMOOTH, -4);
300			imagefilter($this->image, IMG_FILTER_BRIGHTNESS, 2);
301			}
302
303			imagefilter($this->image, IMG_FILTER_GAUSSIAN_BLUR);
304			}
305
306			$this->resize($width, $height);
307			}
308
309			/**
310			* {@inheritdoc}
311			*/
312			public function watermark(LibInterface $image, $x, $y)
313			{
314			if (!($image instanceof self)) {
315			$image = self::createFromString($image->getString());
316			}
317
318			imagecopy($this->image, $image->getImage(), $x, $y, 0, 0, $image->getWidth(), $image->getHeight());
319			}
320
321			/**
322			* {@inheritdoc}
323			*/
324			public function opacity($opacity)
325			{
326			if ($opacity >= 100 \|\| $opacity < 0) {
327			return;
328			}
329
330			$this->format('png');
331
332			$opacity = $opacity / 100;
333
334			$width = $this->getWidth();
335			$height = $this->getHeight();
336
337			imagealphablending($this->image, false);
338
339			for ($x = 0; $x < $width; ++$x) {
340			for ($y = 0; $y < $height; ++$y) {
341			$color = imagecolorat($this->image, $x, $y);
342			$alpha = 127 - (($color >> 24) & 0xFF);
343
344			if ($alpha <= 0) {
345			continue;
346			}
347
348			$color = ($color & 0xFFFFFF) \| ((int) round(127 - $alpha * $opacity) << 24);
349
350			imagesetpixel($this->image, $x, $y, $color);
351			}
352			}
353			}
354
355			/**
356			* {@inheritdoc}
357			*/
358			public function setProgressive($progressive)
359			{
360			imageinterlace($this->image, $progressive);
361			}
362
363			/**
364			* Creates a new truecolor image
365			*
366			* @param integer $width
367			* @param integer $height
368			* @param array $background
369			*
370			* @return resource
371			*/
372			private function createImage($width, $height, array $background = [0, 0, 0])
373			{
374			if (($image = imagecreatetruecolor($width, $height)) === false) {
375			throw new ImageException('Error creating a image');
376			}
377
378			if (imagesavealpha($image, true) === false) {
379			throw new ImageException('Error saving the alpha chanel of the image');
380			}
381
382			if (isset($background[3])) {
383			$background = imagecolorallocatealpha($image, $background[0], $background[1], $background[2], $background[3]);
384			} else {
385			$background = imagecolorallocate($image, $background[0], $background[1], $background[2]);
386			}
387
388			if (imagefill($image, 0, 0, $background) === false) {
389			throw new ImageException('Error filling the image');
390			}
391
392			return $image;
393			}
394			}
395

oscarotero / imagecow

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